[TR] Vibration at Speed

Wed Nov 4 05:41:10 MST 2015

This is a very good point.  However, the original poster is using wire wheels which are hub-centric.  But finding someone who can center a wire wheel (or even work on one at all) can be problematic in its own right.

Dave Massey

-----Original Message-----
From: Tom Note <tom628 at verizon.net>
To: Italyfound <italyfound at gmail.com>; thenicholls <thenicholls at verizon.net>
Cc: *Triumphs List <triumphs at autox.team.net>
Sent: Tue, Nov 3, 2015 7:37 pm
Subject: Re: [TR] Vibration at Speed

I have a similar vibration problem. I've read several times that the problem

is often that the TR wheels shold be balanced on a machine that has a

"lug-centric" adapter, rather than the hub-centric system that most balance

machines use. I haven't found a local place yet, but I haven't really been

looking either. I've heard that some of the higher end imports may require

lug-centric balancing.

But your point, Alex about hub run out is well
taken. Think I'll check that 
out.

Tom

----- Original Message -----

From: "Italyfound" <italyfound at gmail.com>
To: <thenicholls at verizon.net>
Cc:
"*Triumphs List" <triumphs at autox.team.net>
Sent: Sunday, November 01, 2015 7:00
PM
Subject: Re: [TR] Vibration at Speed

> Been a while since I posted but
this caught my eye.
>
> I had the same problem with my 72 TR6. Took a while to
solve the problem 
> but I would bet money this is your problem too.
>
> My
problem was with the face of the hubs. Mine turned out not to be flat 
> but
had a noticeable runout. You can check yours by removing the tire and 
> wheel
and with a run out guage check the surface front to back and top to 
> bottom.
If you a that there is an issue have them surface ground at a 
> machine shop.
Simple process. Solved my problem immediately....
>
> What occurs when they
are bad is when you tighten down the lug nuts the 
> wheel is actually
distorted to match the face of the hub.
>
> Alex Manzo
> 72 TR6
> 59
TR3A
>
>
>
> ----- Original Message ----- 
> From:
<thenicholls at verizon.net>
> To: <r_rochlin at hotmail.com>;
<triumphs at autox.team.net>
> Sent: Tuesday, November 03, 2015 12:26 AM
>
Subject: Re: [TR] Vibration at Speed
>
>
>> Bob, I have a 72 TR6 myself, the
whole front end has been rebuilt, and 
>> the tires are all in
balance.
>>
>>
>> I have a vibration between 60 and 65, I just step on the
gas and go a 
>> little faster until it stops.
>>
>>
>> It has always been
that way so I am kind of used to it.
>>
>>
>> Good luck with
yours.
>>
>>
>> Craig
>> 72 TR6 Vienna, VA
>>
>>
>> On 11/02/15, Bob
Rochlin<r_rochlin at hotmail.com> wrote:
>>
>> Hi Everyone,
>> Over the summer I
got a new set of Michelins for my TR6. The old tires 
>> were 15 years old and
were causing some shimmy vibration as well as being 
>> well past safe. This
was in connection with getting my wire wheels 
>> straightened and trued. The
wires guy, New England Wire Wheel, mounted 
>> and balanced the tires with a
Snap-on static balancer . When I got the 
>> wheels back on the car I went out
for a ride and felt a definite 
>> vibration between 65 and 75 MPH. I concluded
that the wheels needed to be 
>> rebalanced with a dynamic balancer. I found a
shop who could balance the 
>> tires correctly and had them rebalanced. The
tires were little better, 
>> but there was still a pronounced vibration in the
seat and body at 65 to 
>> 75 MPH. I brought the tires back to the tire shop
and they graciously 
>> first checked the tire balance and then rebalanced
them. They said that 
>> the balance was of about a 1/4 oz. , and that two of
the tires seemed to 
>> be a very slightly out of round. I mount those tire on
the rear, but aga
>> in the same problem.
>> I've moved the tires from front
to back thinking if the offending tires 
>> were on the front wheels the
vibration would be through the steering 
>> wheel and not the frame. No joy. My
thought is that there is something in 
>> the driveline causing the vibration,
perhaps the rear brake drums worn 
>> out of balance. The drive shaft was
balanced 5 to 6 years back. Over the 
>> years i've replaced all the universal
joints. As far as I can tell the 
>> rear drums are original to the car, as are
the half shafts.
>> Before I start pulling the driveline apart I thought I see
If anyone has 
>> had a similar problem of a suggestion of where to go next.
I'd appreciate 
>> the input.
>> Bob
>> 72'TR6
>>
>>
>
>
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